Sonic:
Blue anthropomorphic hedgehog
Green eyes, red shoes, white gloves and socks, epic quills, a tail, famous, and the fastest thing alive. Cocky but kind.

Shadow:
Black anthropomorphic hedgehog with red streaks on his quills and limbs, rings around his wrists and ankles, air shoes/rocket boots, red black and white shoes, red eyes, white chest fur, white gloves, cuffs on his ankles and wrists, and fangs, overrated/very famous, deep voice, has a soft spot for cats.

Both are rivals